15257860091 has 2 divisors, whose sum is σ = 15257860092. Its totient is φ = 15257860090.

The previous prime is 15257860069. The next prime is 15257860097. The reversal of 15257860091 is 19006875251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15257860091 - 2¹⁸ = 15257597947 is a prime.

It is not a weakly prime, because it can be changed into another prime (15257860097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7628930045 + 7628930046.

It is an arithmetic number, because the mean of its divisors is an integer number (7628930046).

Almost surely, 2^15257860091 is an apocalyptic number.

15257860091 is a deficient number, since it is larger than the sum of its proper divisors (1).

15257860091 is an equidigital number, since it uses as much as digits as its factorization.

15257860091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 44.

The spelling of 15257860091 in words is "fifteen billion, two hundred fifty-seven million, eight hundred sixty thousand, ninety-one".